Not much detail in the ad, is there. The 400 is very desirable in these cars because it comes w the big block K-frame, mounts, trans, etc. An RB swap is a bolt-in affair.
Looks like an older low-buck semi-custom, watch for bad bodywork and rust "repair" in the usual areas... cowl, quarters, window channels, etc. I can see rust over the rear wheelwells even on my phone. When I had my 76 there were no patch panels available. That may have changed, been about 3 yrs. It looks like the roof/quarter seams are starting to pop... they always do. Chunk the lead out and use long-strand 'glass. Also looks like some of the back light trim is missing. Easy enough to replace but it probably still has the "grained" (vinyl top) trim and the non-vinyl-top pieces are hard enough to find that I'd call it impossible. Slick-roofed Cordobas/Chargers were exceptionally rare but did exist. The later, square headlight models (78-79) have better looking trim without the "leather grain" but may take some massaging to get it to fit right.
It might be a real cream puff w goofy paint (SS stripes? Really?) and wagon wheels. Or it might be trash. If I was close I'd go check it out, it's definitely worth investigating.
